how the United States has started to give the first signals of not being completely unconditional in the support for Israel
There are a couple of things you're missing.
First is that what we're witnessing here is not new. They've been doing this from the start, and that start is not 6 months ago but is 75 years ago. The tactics are the same too. Taking hostages, torturing and killing women and children, ethnically cleansing Palestinians, mass murder like in Sabra and Shatila 40+ years ago, assassinations abroad, terror attacks, etc...
...and US regime has been supporting all of this all this time and nothing has changed regarding those crimes against humanity or the support of it.
Second is the fact that regardless of these pretty but empty statements by the US regime, there has been no difference in their actions! As they say
actions speak louder than words. There is a direct line of weapons supply from US caches to Israel that has not stopped. There is logistical and intelligence support that has not stopped. There are US military personal inside occupied Palestinian soil with high ranking officers who are commanding this war of genocide. None of it has stopped or even decreased...
Here are the reasons why Biden is making such empty moves:
1. Generally speaking Americans are tired of wars whether it is being stuck in Afghanistan, Iraq, Syria, etc. or the new ones like Ukraine, Palestine and possibly even Taiwan. So every official in the US regime have always always pretend to be anti-war for the votes and there's an election coming. For example Trump promised to pull out of Afghanistan to increase his votes but after taking the office he never did. Biden gave the same promise and he never did either (US military was forced out).
2. As I said there's an election coming and Biden's competitor is using all these wars against him claiming he (meaning Trump) would stop all of it if he is elected so Biden has to pretend to be doing the same too.
3. This is not just war, it is genocide and people across the globe are getting increasingly outraged as they watch the genocide of Palestinians and they see it is mainly US that is supporting it, like when almost all UN security council members vote for a cease fire resolution and only US vetoes it. That means the world now blames US for the ongoing genocide as much as they blame Israel. The censorship is no longer working either, for example we saw that despite censorship of
Aaron Bushnell's self immolation it shook US military to its core (corp!). So the regime has to do something to pretend otherwise.
4. One of those things is to try to focus all the blame on one person (ie. Netanyahu) try to replace him with another terrorist as the head of the organization who changes tactic and would continue the genocide
covertly that wouldn't increase global outrage as much as right now. But it would be like replacing Hitler in the Nazi regime with another radical fascist while keeping the Nazi regime intact! If you ever watch the Zionists Hakham you will learn that Israeli soldiers murdering 14000 children in only 6 months is not accidental, they are being told that they must murder children!!!
5. Last but not least it's a World Order thing. In the previous World Order that is currently dying slowly but surely, US regime was the unipolar power. That meant controlling every "mechanism" in the world including international organizations such as United Nations. Over the past 6 months regarding Gaza and even in the past 2+ years regarding Ukraine the UN has proven to be completely useless and it is starting to lose its position and may even fall apart in the near future. The US regime is desperately trying to keep this "weapon" alive, hence the lack of veto in the latest resolution.